From a99b44f2a23d23faba4610092ac7929eeed6b06c Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Mon, 23 Apr 2018 10:58:42 +0300
Subject: [PATCH] Fix for the issue #2461: crash when changing points on plane
 creation

---
 src/ConstructionPlugin/ConstructionPlugin_Validators.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/ConstructionPlugin/ConstructionPlugin_Validators.cpp b/src/ConstructionPlugin/ConstructionPlugin_Validators.cpp
index a3bd2bd53..146e3055a 100644
--- a/src/ConstructionPlugin/ConstructionPlugin_Validators.cpp
+++ b/src/ConstructionPlugin/ConstructionPlugin_Validators.cpp
@@ -26,6 +26,7 @@
 #include <GeomAPI_Lin.h>
 #include <GeomAPI_Pln.h>
 #include <GeomAPI_Vertex.h>
+#include <GeomAPI_Pnt.h>
 #include <GeomAlgoAPI_ShapeTools.h>
 
 #include <ModelAPI_AttributeSelection.h>
@@ -212,6 +213,11 @@ bool ConstructionPlugin_ValidatorPlaneThreePoints::isValid(const AttributePtr& t
   std::shared_ptr<GeomAPI_Pnt> aPnt2 = aVertex2->point();
   std::shared_ptr<GeomAPI_Pnt> aPnt3 = aVertex3->point();
 
+  if (aPnt1->isEqual(aPnt2)) {
+    theError = "Selected points are equal";
+    return false;
+  }
+
   std::shared_ptr<GeomAPI_Lin> aLin(new GeomAPI_Lin(aPnt1, aPnt2));
 
   if(aLin->contains(aPnt3)) {
-- 
2.39.2